Safety appliance for elevators.



No. 878,489. K l F. M. ASHBY.

' SAFETY APPLIANGE POR ELEVATORS,

APPLICATION FILED AUG. 24, 19C?.

PATENTED FEB. 11, 1908.

Q J 1719/7?? fa i .ff/7 L *if f5 il JW tional view of the uppoi' portion of the elevator cnr mit on the line, 3--3 of Fig. l.

FRANCIS M; ASHBY, oF

PRINCETON, INDIANA.

SAFETY APPLIANCE FOR ELEVATORS.

Speccation of Letters Patent.

` Patented Feb. 1 1, i908.

)I Application Sled August 24. 1907. Serial No. 390.059.

T o all '107mm 'it may concern.:

Be it known that l. F RANcis M.' Asrii', a l citizen of the Unit-ed States, residing at 'Princetom in the county of Gibson and -Statel of Indiana. have invented a new and useful Safety Appliance for Elevators, of which the following is a specification. i

This invention has relation to safety applianees for elevators and it consists in the novel construction and arrangement of,its parts as hereinafter shown and deseribedf The object of the invention is to provide g a safety appliance adapted to he. attached to the head or top of the. elevator oar and the parts of which are so arranged that they will automatically engage and check the deseent of the car should the supporting eahle thereof g separate. The appliance may also he used to hold the car in a steady position when :it rest.

The car guides are provided with grooves or strips, the opposite sides of which, are )rovided with compound curved surfaces.

he head of the elevator ear is provided with shafts having limited lateral movement with their end portions lyingr within the grooves of the opposite guides, A cross har is located upon the head ol' the. elevator ear and is provided with wedges which are adapted to pass between the said shafts and force the same apart, whereby, their end portions are forcedinto posit-ivo contact with the curved sides of the grooves. The elevator ear head is connected u i with the operating` eahle as is also the said liar. The eonnection between the har and the (zahle being of suoli length that. so long as stress is u on the elevator cahlo the wedges will he he d ahove and out of oontaet with the shafts, hut should the said eahle wart, a' s ring mechanism is provided for forcing t-.ie wedges between the shafts.

ln the nm'oinpanjying drawing:-Figure l is u. side elevation of :in elevator provided with the appliance. l"ig..! is a topplan view of the saine, and Fig. 3 is n transverse seo- The guides l, l are vertically arranged at theY sides of the elevator shaft in the usual manner. Said guides are provided uponi their inner l'aees with strips or llanges i .Said flanges are arranged in pairs upon the guides and aro .spaced apart, leaving tho/i grooves or recesses 3. Th" opposite. inner@ edges of the strips 2 are provided with conil v zoritall) disposed.

l pound surfaces 4 which gradually approach and recede from each other. he ear 5 is provided atits sides ii ith the strips (i whieh operate alongr the outer sides of the stri is 2. The head of the elevator ear consists ol the plates wliieh hear against the fares of the l strips 'l and which are provided with elongated openings` S with their longr axes hori- 'lhe cross pieces (l eou- 'l'he shafts l0,

neet the plates i together.

A 10 are looselv mounted in the o ieninos S and their end portions lie in the grooves 3. Said shafts are held against longitudinal movement h v the collars 1i which hear against the inner faces of the plates 7.

The hails l2 are attzii'lu-d at their lowerv ends to the eros-s pieees 9 and are eonneated at their upper portions hy means of the chains i3 with the ring l-l io which is nttached the end of the elevator eahlo l5. The. inner faves of the plates T are provided with The intermediate portion of the spring l!)V is attaehed to the intermedi-.nto portion of the yoke. IS and the ends of the spring l.) hear directly upon the upper edge of the har i7'. 'lho wedges 2l) :in` i'ariied h v the har i7 and are loi-ated :ihove the shafts lll and aro disposed vertieally over the. spare hetween tho said shafts. The hails '.l aro attached to the cross pieve IT Vand pass over the spring l!) and are vonneoted by means of t c chains 21.? with the ring 14. The links 2l and chains 22 nro of sueh length with relation to the links i'. and rhains l that the eross pieve i7 will he held in :in elevated posilioii when Ihe elevator eahle l5 is under stress. Should the said eahle l5 heeoine slark or, for :my reason parl, the tension of the. spring lil will rome into play and forse lho har l? down which in turn will projeei. the wedges 0 between tho shafts l() and spread the saine so that iheireiid portions- 2 armas slack, it is eectually braced against lateral sWa or vibration.

T e guides-1 are made of steel and are provided with bolt holes, as indicated in Fig. 3, through which holes bolts may be passed to fasten the guides.to the elevator-shaft framework.

Having described my invention what I claim asnew and desire to secure by Letters- Patent is:-

' 1. In combination 'with guides having grooves provided with edges describing compound curves, an elevator car mounted for movement between the guides, shafts mounted upon the elevator car and having their'end ortions lying within the grooves of the gui es, and means mounted upon the elevator car for moving the shafts laterally into engagement with the edges of the grooves of the guides.

' 2. In combination with guides having grooves provided with edges which describe ,compound curves, an elevator car mounted for movement between the guides, shafts mounted upon the elevator car and having their end portions lying within the grooves of the guides, wedges mounted upon the elevator car and spring actuated means for projecting the wedges between theshafts.

3. In combination with guides having grooves provided with edges which describe compound curves, an elevator car mounted for movement within the guides, shafts mounted u on the elevator car and having their ends ying within the `des, a movable bar mounted upon the e evator car and having wedges attached thereto, a spring bearing upon the bar and means operatively connecting the bar with the hoistlng means of the elevator car.

4. In combination with guides having grooves with edges describing compound curves, an elevator car mounted for movement between the guides, a hoisting means for the car, shafts mounted upon the elevator car and having their end portions lying within the grooves of the guides, a bar movably mounted upon the elevator. car and having depending wedges, a yt-ke attached to the top of the elevator car and passin over said bar, a spring attached to the yoA e and bearing against 'the bar, and means connecting the top of the elevator car with the hoistin means and means connecting said bar wit the hoisting means.

In testimon that I claim the foregoing as my own, I ave hereto aflixed my signature in the presence of two witnesses.

FRANCIS M. ASHBY.

Witnesses:

MADISON SMITH, JOSEPH PABTENHEIMER. 

